D-Link DWL-3500AP Configuration Manual page 13

The Channel adjustment algorithm may be triggered periodically or manually.
To manually adjust the channel plan, use the following steps:
1. Select the WLAN tab from the navigation panel and navigate to Administration
Management
2. Choose the 802.11 b/g and select the Manual Channel Plan tab and then the Start
button to start the process. Use the Refresh button to check the results of the channel
plan.
3. Apply the suggested channel plan by clicking on "Apply" button.
Note: Before manually triggering the adjustment, the Channel Plan History Depth must be set
to 0 or 1. This can be done by changing the Channel Plan History Depth in the Configuration
tab of the RF Management. By default this parameter is set to 5.
RF Management.
AP